Aluminum Conductors

September 5, 2024 Michael Traskos

While there are benefits to replacing copper wires with aluminum, parts selection must align with the specific installation requirements. Here, we discuss the fundamentals of aluminum conductors, their limitations as described by aerospace standards, and techniques for their implementation. Read more

Testing and Qualification of Fuses

August 20, 2024 Michael Traskos

Aircraft electrical fuse testing includes electrical, mechanical, chemical, and thermal conditions that are representative of the aircraft in question. This article discusses the basics of electrical fuses and how they are qualified for aerospace use. Read more

High Voltage, Low Current Material Arc Resistance Testing

July 26, 2024 Megan Chambellan

Long-term exposure to high-voltage can cause an insulating material to break down and, over time, even form conductive paths along its surface. The ASTM D495 test method is a preliminary assessment of an insulating or dielectric materials’ resistance to carbon arc tracking. In this article, we discuss this test method as well as the impact and limitations of the provided results. Read more

Understanding Filter line Cables: Purpose, Construction, and Key Concepts

July 15, 2024 Michael Traskos

The primary purpose of filter line cables is to minimize EMI and RFI, which are prevalent in environments with high levels of electromagnetic noise. In this article we discuss the unique construction and application of filter line cable to better understand how these cables can be utilized in high-interference environments to protect electrical signals. Read more

To Shield or Not to Shield – A Question on High Voltage DC Cables

June 21, 2024 Michael Traskos

Shielding on aerospace cables offers several benefits but can introduce some drawbacks that must be considered. In this article, we explore the pros and cons of using shielded cables on aircraft. Read more

AS50881 and Connectors

June 3, 2024 Michael Traskos

Amidst the vast amount of aerospace standards, AS50881 stands out as a comprehensive guide to requirements to ensure wire termination safety specifically in connector installation and design. In this article, we discuss some of the important guidelines for connector installation, separation, and identification covered by AS50881. Read more

Inspectability of EWIS

April 1, 2024 Michael Traskos

Though EWIS should be protected from hazards such as tampering, FOD, and fluid exposure, the system does need to be periodically inspected and maintained throughout its service life. In this article, we discuss some of the industry guidance, regulations, and methods commonly used to ensure accessibility of the EWIS for the appropriate personnel. Read more

Insertion Loss and Attenuation

March 14, 2024 Michael Traskos

Insertion loss and attenuation are similar concepts, but one is assigned to a single component (insertion loss) whereas the other is assigned to generalized performance (attenuation). In this article, we will discuss the similarities and differences of these concepts and how proper testing of each can ensure reliability in signal transmission. Read more

The Use of Splices

February 20, 2024 Michael Traskos

Though useful in repairs and modification, overuse of splices can lead to serious electrical and mechanical problems in an electrical system. This article discusses the applications and restrictions of electrical splices on aircraft. Read more

Protected Harness Design

January 30, 2024 Michael Traskos

Wiring harness protection materials address needs such as fire protection, physical damage protection, chemical protection, and wire management but may also present challenges such as overheating or difficulty of access for maintenance activities. In this article, we elaborate on some of the common uses of added harness protection and address many of the benefits and drawbacks of open vs protected harnesses. Read more

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